QSFP-DD transceivers (DD = Double Density) have become the most popular formfactor for 400G due to their size and efficiency compared to competing solutions in OSFP or CFP2 formats. The demand for 400G connectivity is driven by the tremendous requirement for high bandwidth in metro-/regional networks and cloud data center interconnects.
Smartoptics range of QSFP-DD transceivers
Smartoptics has several varieties of QSFP-DD transceivers for different use cases. Some of the most popular options are:
400G-DR4: up to 500m on singlemode ribbon fiber.
400G-FR4: up to 2km on singlemode ribbon or duplex fiber.
400G-LR4: up to 10km on singlemode ribbon or duplex fiber.
Coherent 400G: up to 450km over DWDM.
All three R4 QSFP-DD transceiver types can be used for 400 to 4x 100G break-out applications where four 100G transceivers are combined with the same type of 400G transceiver (DR4, FR4 or LR4).
Coherent 400G QSFP-DD transceivers are the only type with DWDM support, making them a perfect match for ROADM-based architectures. They can also be used with duplex LX connectors.
QSFP-DD DAC and AOC
QSFP-DD Direct Attach Copper (DAC) cables provide a complete cable assembly instead of discrete components for short-distance connectivity. QSFP-DD Active Optical Cables (AOCs) are also complete cable assemblies but use real transceivers and are suitable for longer distances.
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